Finding the Fourth Proportional to 1,008,499.20, 1,391,716.56 and 555,780.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008,499.20 : 1,391,716.56 = 555,780.48 : x
2. Step 2: Convert to fraction form
   1,008,499.20/1,391,716.56 = 555,780.48/x
3. Step 3: Cross multiply
   1,008,499.20x = 1,391,716.56 × 555,780.48
4. Step 4: Simplify right side
   1,008,499.20x = 773,488,897,740.75
5. Step 5: Solve for x
   x = 773,488,897,740.75/1,008,499.20
6. Step 6: Final answer
   x = 766,970.26